Features: Achieve personalized battery charging and discharging with the PB0A module, providing flexibility for your specific needs. Efficiently charge and discharge batteries current up to 3.1A saving you time and improving efficiency. Strong compatibility: suitable for various types of lithium batteries, including common specifications such as 18650, 26650, etc. It is widely used in consumer electronics product etc. Safety protections: equipped with multiple safety protections mechanisms such as overcurrent protections, over temperature protections, shortcircuit protections, etc., to ensure safety and stability during the charging and discharging process. Small Size,easy to carry and use. Specifications: Input voltages range: 5~5.5V Charging cut-off voltage: 4.2-4.4V (default4.2V charging current: 0.1-3.1A Discharge cut-off voltage: 2.95V Boost output voltage: 5v~5.15V Boost output rippleand noise: 15omvpp Boost output current: 2.40A Boost conversion efficiency:more than 90% (when the battery voltage is 3.6V and the load is 0.5-2.4A) Static current (boost normally open): 900uA Static current (boost automatic shutdown): 10OuA Package Includes: 1PC PB0A Battery Charging Module note: Please allow 0-1cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color